fixes inverted EICAR corruption logic

Urgent, fixes #4068
Fixes my inverted EICAR corruption logic.  Logic was inverted in f19b093529f3b3aacefb69f8133ab788859445d1

When landing, please commit message with Fixes #4068.

After this lands, I will land 4069 which is a spec @jvennix-r7, aka, "Da Man" wrote to cover this

## Verification

-[ ] On a fresh checkout, make sure msfconsole starts w/o erroring out.  Alternatively also pull the spec from 4069 and run that